Who is the author of Kadambari?

Kadambari is a Sanskrit romance novel. It was largely written by Banabhatta in the first part of the seventh century CE, but he did not live to see it finished. 

Bhushanabhatta, Banabhatta's son, finished the novel according to his late father's instructions. 

Final Answer: Hence, the correct option is (d) i.e. Banabhatta